As a Bounty hunter I once made a mistake by selling tokens from Bounty that I received in a small market for $ 250. After 20 days the price of tokens that I sell is worth $ 1200. So the conclusion if you want to wait you will get maximum results. Believe every ICO project will prepare a good market in the future.
There might be other scenario, since you are selling away your altcoin which should be either btc or eth and let say if eth or btc suddenly make a sharp rise of price that means you are also earning which might be equal to what you earn from the altcoin or even more.